Lighting module and lighting device comprising same

Abstract

A lighting module disclosed in the embodiment of the invention includes a substrate; a plurality of light emitting devices disposed on the substrate; a resin layer disposed on the substrate and the light emitting device; a phosphor layer disposed on the resin layer; and a recess portion overlapping the light emitting device in a vertical direction, wherein an upper surface area of the recess portion includes a range of 50% to 150% of an upper surface area of the light emitting device, and the recess portion is formed to be concave toward the upper surface of the resin layer from the light emitting device and may include an inclined side surface lower than the upper surface of the resin layer.

What is claimed is: 
     
       1. A lighting module comprising:
 a substrate; 
 a plurality of light emitting devices disposed on the substrate, each of the light emitting devices includes an LED chip that emits light from a plurality of side surfaces and from an upper surface; 
 a resin layer disposed on the substrate and the plurality of light emitting devices; 
 a phosphor layer disposed on the resin layer, the phosphor layer including a top portion disposed on an upper surface of the resin layer and a plurality of side portions on all outer side surfaces of the resin layer such that the resin layer is surrounded by the plurality of side portions, wherein each of the side portions separately contacts an upper surface of the substrate; and 
 a plurality of recess portions overlapping each of the light emitting devices in a vertical direction, wherein a total number of the plurality of recess portions is same as a total number of the light emitting devices, and an edge between two side surfaces of the recess portion corresponds to an edge between two side surfaces of the light emitting device that vertically overlap the recess portion, 
 wherein an upper surface area of each separate one of the recess portions is within a range of 101% to 150% of an upper surface area of a separate corresponding one of the light emitting devices that is vertically overlapped by the recess portion, 
 wherein each of the recess portions is formed to be concave toward a corresponding one of the light emitting devices on the upper surface of the resin layer and includes an inclined side surface which is lower than the upper surface of the resin layer, 
 wherein a pitch between two of the light emitting devices is equal to or greater than a thickness of the resin layer in the vertical direction, and 
 wherein a shortest distance between each of the light emitting devices and a corresponding one of the recess portions is within a range of 3 to 5 times a thickness of the light emitting device in the vertical direction, 
 wherein a thickness of the top portion of the phosphor layer in the vertical direction is within a range of 15% to 25% of the thickness of the resin layer in the vertical direction. 
 
     
     
       2. The lighting module of  claim 1 , wherein an angle formed between a side surface of each of the recess portions and a horizontal upper surface of the resin layer is within a range of 30 degrees to 50 degrees. 
     
     
       3. The lighting module of  claim 1 , wherein each of the recess portions has an inverted cone or an inverted polygonal pyramid shape. 
     
     
       4. The lighting module of  claim 1 , wherein each of the recess portions is filled with air or comprises a material having a refractive index of 1. 
     
     
       5. The lighting module of  claim 1 , wherein each of the recess portions includes a vertex that is a lowermost point of the inclined side surface,
 wherein an inner angle formed by one side and the other side of each of the recess portions is 80 degrees to 120 degrees based on the vertex. 
 
     
     
       6. The lighting module of  claim 1 , wherein the phosphor layer includes a red phosphor, and at least one of the resin layer and the phosphor layer includes a diffusion agent. 
     
     
       7. The lighting module of  claim 1 , wherein an edge of an upper surface of each of the recess portions and an edge of an upper surface of each of the light emitting devices extend in a same direction. 
     
     
       8. The lighting module of  claim 1 , comprising a light shielding portion or a phosphor portion disposed between each of the light emitting devices and the resin layer. 
     
     
       9. The lighting module of  claim 1 , comprising a reflective member disposed between the substrate and the resin layer and disposed around each of the light emitting devices, and a height of the reflective member is lowered toward an edge from a center region between adjacent light emitting devices. 
     
     
       10. The lighting module of  claim 9 , wherein a high point of the reflective member is disposed higher than an upper surface of the light emitting device. 
     
     
       11. The lighting module of  claim 9 , wherein the reflective member is in contact with the phosphor layer disposed on the side surfaces of the resin layer. 
     
     
       12. The lighting module of  claim 1 ,
 wherein an interval between the light emitting devices is smaller than an interval between the recess portions. 
 
     
     
       13. The lighting module of  claim 1 , wherein a linear distance from a lower surface of the substrate to an upper surface of the phosphor layer is in a range of 3 mm to 5 mm. 
     
     
       14. The lighting module of  claim 1 , wherein each of the plurality of recess portions is provided as an empty space between the resin layer and the phosphor layer. 
     
     
       15. A lighting module comprising:
 a substrate; 
 a plurality of light emitting devices disposed on the substrate, each of the light emitting devices includes an LED chip that emits light from a plurality of side surfaces and from an upper surface; 
 a resin layer disposed on the substrate and the plurality of light emitting devices; 
 a phosphor layer disposed on an upper surface and side surfaces of the resin layer, the phosphor layer including a top portion disposed on the upper surface of the resin layer and a plurality of side portions on the side surfaces of the resin layer such that the resin layer is surrounded by the plurality of side portions, wherein each of the side portions separately contacts an upper surface of the substrate; and 
 a plurality of recess portions overlapping each of the plurality of light emitting devices in a vertical direction, wherein a total number of the plurality of recess portions is same as a total number of the light emitting devices, and an edge between two side surfaces of the recess portion corresponds to an edge between two side surfaces of the light emitting device that vertically overlap the recess portion, 
 wherein the resin layer is disposed on upper side and outer side of each of the plurality of light emitting devices, 
 wherein an upper surface area of each separate one of the plurality of recess portions is within a range of 101% to 150% of an upper surface area of a separate corresponding one of the plurality of light emitting devices that is vertically overlapped by the recess portion, 
 wherein each of the plurality of recess portions is formed to be concave toward a corresponding one of the plurality of light emitting devices on the upper surface of the resin layer, and includes an inclined side surface which is lower than the upper surface of the resin layer, 
 wherein a pitch between two of the light emitting devices is equal to or greater than a thickness of the resin layer in the vertical direction, 
 wherein a shortest distance between each of the plurality of light emitting devices and a corresponding one of the plurality of recess portions is within a range of 3 to 5 times a thickness of the light emitting device in the vertical direction, and 
 wherein a linear distance from a lower surface of the substrate to an upper surface of the phosphor layer is within a range of 3 mm to 5 mm. 
 
     
     
       16. The lighting module of  claim 15 , wherein each of the plurality of recess portions is an empty space between the resin layer and the phosphor layer,
 wherein side surface of each of the plurality of recess portions is non-contact with the phosphor layer. 
 
     
     
       17. The lighting module of  claim 15 , wherein an angle formed between a side surface of each of the recess portions and a horizontal upper surface of the resin layer is within a range of 30 degrees to 50 degrees,
 wherein each of the recess portions includes an inverted cone or an inverted polygonal pyramid shape, 
 wherein each of the recess portions includes a vertex that is a lowest point of the inclined side surface, 
 wherein an inner angle formed by one side and the other side of the recess portion is 80 degrees to 120 degrees based on the vertex. 
 
     
     
       18. The lighting module of  claim 15 ,
 wherein an interval between the light emitting devices is smaller than an interval between the recess portions. 
 
     
     
       19. The lighting module of  claim 15 , wherein the phosphor layer comprises a red phosphor, and the resin layer is provided without a diffusing agent, and
 wherein an edge of an upper surface of each of the recess portions and an edge of an upper surface of each of the light emitting devices extends in a same direction. 
 
     
     
       20. The lighting module of  claim 15 , wherein a thickness of the top portion of the phosphor layer in the vertical direction is within a range of 15% to 25% of the thickness of the resin layer in the vertical direction.